Christopher Steele waded back into American politics on Friday as the British ex-spy’s private investigative firm rebuked criticism from President Trump and defended the Trump-Russia dossier.

“Yesterday @realDonaldTrump made false claims about us,” Steele’s company Orbis Business Intelligence tweeted on Friday morning. “He wildly exaggerated our fees and, contrary to his claims, we have never stated any of our reporting is ‘fake’. We stand by the integrity of our research on Kremlin interference in the 2016 election and support for Trump.”